Ford Heiress The BOMBED Sobriety Test

4/5/2011 2:15 PM PDT

Ford Motor Company heiress Elena Ford had SERIOUS trouble with her ABC's on Sunday during the field sobriety exam that led to her arrest -- this according to the police report obtained by TMZ.


According to the report, the arresting officer asked Elena to recite the alphabet -- and she responded, "A B C D E F G A B C H I D J K L M NO P Q R S T U V X W Z." Yes, that's 29 letters.

It got worse from there -- the report continues, claiming Elena also couldn't count back from 100-80 ... counting, "100 99 98 97 96 (PAUSE) 94 96 95 94 93 92 91 90 ... 80 89 88 87 86 85 84 83 82 81 80."


According to the report, Elena blew a .14 -- nearly twice the legal limit -- after she was arrested for DUI with her 11-year-old son in the back seat.